The U.S. Coast Guard is poring over the cell-phone records of one of four fishermen missing off the coast of Long Island to try to figure out where the group was when the man placed his last call.

The men, whose boat vanished Saturday morning during a shark-hunting tournament, were apparently last heard from about three hours after heading out to sea – shouting, “Mayday! Mayday! Mayday!” into their emergency radio, authorities said.

“Unfortunately, we’ve not been able to locate any signs of the vessel or its four occupants,” a grim Coast Guard Lt. Cmdr. Brendan McPherson said yesterday. “But we are still searching.”

Authorities said there is still hope for the men because their tiny boat was equipped with survival suits that could keep them alive in 60-degree water.

Missing are Robert Hammond, a 59-year-old retiree, and his son Robert Hammond Jr., 35, both of Oceanside, as well as pals Robert Wright, 46, of Island Park, and Peter Quinn, a plumber.

The group was last seen at 6 a.m. Saturday, heading out to sea in the Hammonds’ 25-foot boat, Eleni II, about 12 miles off Jones Beach Inlet.

The men were competing in the annual Hudson Angler’s Shark Tournament out of Freeport.

Wright and Quinn, fishing with another friend two weeks ago, landed a 192-pound mako – the first of the season.

The 5- to 7-foot waves on Saturday sent many tournament entrants back to port, but the event proceeded, sparking Wright’s wife to charge it should have been canceled.

Toni Wright said two other fishing tourneys were canceled Saturday because of the rough seas.

She also said she does not believe her husband, an experienced fisherman, will return home alive.

The first radio distress call believed to have come from the small craft was received by two Coast Guard stations about 9 a.m. Saturday. Another distress call came in minutes later, and an initial Coast Guard search was launched without success.

When the boat failed to return to the Freeport marina at 7 p.m. Saturday, the Coast Guard was notified and a wider search began. It lasted until Sunday night, then resumed yesterday morning.